TEM air analysis results, Oct 22 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS lab group.#: 5739 - 10/22/01

Lab Sample No. Client Spl. No. 61955 20 Filter Type MCE 25 mm Filter Area 385 mm^2 Operacor AC Instrument: I.D. EM 10 CRX Grid I.D. Disk No.

Screen Maonificacion 16,400X (GO) Area 0.01124 mni"2 Comments

Acc. Volcage 80 kV No. GO co be Analyzed 3.147 Scrucc. Corspd. .co 70 s./mm"2.) '

GO. structure Structure Type Length I.D. of Structure N or EDS ^0.5 um (Nonasb. No Coord. No. F B C M :> Sum Chrys. Amphibole Nonasb. ,Ambig./ND Elements) < 5 um / (7^ 7 3 iS fl .

Photo No. (from 1 in 5 aabeal^a^ Identify all atructurea uaing EDS Check diffraction for asbestos Store all unrepealed spectra containing samples) Grid acceptance:! atrucLures up to 708/i?»m (lat 4) struct = > O.Sum ik > 5:1 Aspect Ratio <S0X undissolveo filter, overlapped or folded <10X particulate coverage >50X coverage Ns Not Observed (ZDS apectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforminf <SX holes or opaque areas F B C M > Sum to laboratory identification criteria observed. 'Unused portion Por chryaoUle: 0.73nm apacins for (Q2Q) renscUons, or niter Chrysotile O.SSnm spacing for the layer line repeat, atreaklnt -Avoided portion of {110) and (130) refiectlons. of niter Por amphiboles: C.53nm layer line repeat, and approx. / Portion of filter \ {2mm wide) 3.S ratio of non-tvinned layer line spot apaclng to I subject to examination / Amphibole layer Une repeat dlatance {0.53nm). v/s EDS spectrum conforminf to laboratory identification criteria observed. amphiboles ...... Arhbiguous F= Single Fiber (1-3 interaectlona s 1-3 fibers) Amosite 0= Bundle (>3 fibers <l fiber diameter apart) Cs Cluster {>3 intersections) 25mm fULar J stopping Rules: I--------- - Crocidolite Non—asbestos Ms Matrix AnthophyUile NSDs Ne Structures Detected >30 s/C.O. or in lat 4 G.O. Tremolite Actinolite Non-Idenlified L\ DATA\ PRIVATE M IKEC\ CADDVCMS 9/22/98

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